Suppose the average solar flux reaching the United States is 200 W/m2. This average is t...

Suppose the average solar flux reaching the United States is 200 W/m². This average is taken over a whole year and take5 into account seasonal effects and weather (clouds), and assumes fixed solar cells. (a) Find the total energy produced in one year by a 1m² cell producing energy with an efficiency of 15%. (b) flow much area would have to be covered with these solar cells in order to supply the United States with all its electricity, if the yearly electrical energy consumption in the United States is about (c) Real solar arrays require about 2.5 times as much area as you found in (b) in order to keep one array of cells from shading another. What fraction of the land area of the United States (about ) would have to be covered with solar cells to meet the nation's energy requirements? 27. In this problem you will examine the temperature dependence of the forward/reverse bias modes of a di-ode. (a) For a pn-junction diode compute the ratio of forward bias current to reverse bias current with an applied voltage of 1.50 volts at each of the following temperatures: 77 K, 273 K, 340 K, 500 K. (b) Comment on the results with respect to possible applications.